mem-cache: Fix invalidation of prefetchers

Add an invalidation function to the AssociativeSet, so that entries
can be properly invalidated by also invalidating their replacement
data.

Both setInvalid and reset have been merged into invalidate to
indicate users that they are using an incorrect approach by
generating compilation errors, and to match CacheBlk's naming
convention.

Change-Id: I568076a3b5adda8b1311d9498b086c0dab457a14
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/24529
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/src/mem/cache/prefetch/signature_path.hh b/src/mem/cache/prefetch/signature_path.hh
index 3bf4dd293..d2464e27a 100644
--- a/src/mem/cache/prefetch/signature_path.hh
+++ b/src/mem/cache/prefetch/signature_path.hh
@@ -99,12 +99,16 @@ class SignaturePathPrefetcher : public QueuedPrefetcher
         /** use counter, used by SPPv2 */
         SatCounter counter;
         PatternEntry(size_t num_strides, unsigned counter_bits)
-            : strideEntries(num_strides, counter_bits), counter(counter_bits)
-        {}
+          : TaggedEntry(), strideEntries(num_strides, counter_bits),
+            counter(counter_bits)
+        {
+        }
 
         /** Reset the entries to their initial values */
-        void reset() override
+        void
+        invalidate() override
         {
+            TaggedEntry::invalidate();
             for (auto &entry : strideEntries) {
                 entry.counter.reset();
                 entry.stride = 0;